Has anyone tried this? I was hoping to buy a set of Mordaunt-Short Genies, using the TV as centre speaker and the 'spare' genie as a centre-rear. The 9986's NXT speakers seem adequate for dialogue so I'm quite hopeful. A couple of questions though: Having never really understood impedance, am I likely to run into to problems connecting my receiver to the mixture of speaker type? Should I use my amp's 8ohm or 4ohm setting?